Detailed Description

template<std::uint8_t(*)(std::size_t offset, std::size_t write_size, const std::uint8_t *value) F>
struct bluetoe::free_write_blob_handler< F >

binds a free function as a write handler for the given characteristic

The handler can be used to handle blobs. If only a write handler is passed to the bluetoe::characteristic, the characteristic will be write only. If the characteristic value will always be smaller than 21 octets, using a bluetoe::free_raw_write_handler will save you from coping with an offset.

Template Parameters

F	pointer to function to handle a write request

Parameters

offset	offset in octets into the characteristic beeing written. If the offset is larger than the characteristic, the handler should return bluetoe::error_codes::invalid_offset
write_size	The size of the data that should be written to the characteristic value. If the size given is to large, the handler should return bluetoe::error_codes::invalid_attribute_value_length.
value	Input buffer containing the desired characteristic value.

Return values

If the characteristic value could be read successfully (even when the out_buffer was to small, to read the whole value), the function should return luetoe::error_codes::success. In all other cases, Bluetoe will generate an error response to a read request and directly use the return value as error code. For usefull error codes, have a look at bluetoe::error_codes::error_codes.

See also: characteristic; free_read_blob_handler; free_read_handler; free_raw_write_handler; bluetoe::error_codes::error_codes

Examples: read_write_handler_example.cpp.

The documentation for this struct was generated from the following file:

bluetoe/characteristic_value.hpp